Have seen some great wooking projects on this site. I need help with determining how far from the rear wall to place the 8 foot high chain pivot point so a porch swing will not strike the wall. Can someone who has a swing measure what I should allow. Rather than building a swing, my task is coming up with a support system that will be cantileveled off the roof load bearing side wall using the tail piece of the truss for the 12 inch soffit. Hence, I'd like to keep the distance from the wall to a minimun for the swing load moment arm effect but don't want to be striking the wall. Thanks for your help!